diff --git a/packages/schematics/angular/app-shell/schema.json b/packages/schematics/angular/app-shell/schema.json
index 6c5a3a5e66..ad9c48e5fe 100644
--- a/packages/schematics/angular/app-shell/schema.json
+++ b/packages/schematics/angular/app-shell/schema.json
@@ -51,7 +51,8 @@
     "tsconfigFileName": {
       "type": "string",
       "default": "tsconfig.server",
-      "description": "The name of the TypeScript configuration file."
+      "description": "The name of the TypeScript configuration file.",
+      "x-deprecated": "This option has no effect."
     }
   },
   "required": [